What is the primary function of the myostatin protein in cells?

• To build and move muscles

• To send a message in a cell

• To store energy

• To produce hormones

How does the myostatin protein interact with a cell?

• It dissolves in the cell membrane

• It fits into a receptor like a key into a lock

• It breaks down the cell wall

• It changes the cell's DNA

Why might you not notice the effect of myostatin at the scale of one cell?

• Because it only affects the cell's DNA

• Because its effect is more noticeable on an entire organism

• Because it only affects the cell membrane

• Because it is inactive at the cellular level

What is the role of the receptor in the function of myostatin?

• To produce energy for the cell

• To relay messages from outside the cell to inside

• To break down nutrients

• To store genetic information

What is the consequence of a myostatin protein not fitting correctly into a receptor?

• It enhances muscle growth

• It prevents the message from being sent inside the cell

• It causes the cell to die

• It changes the cell's DNA

What is the main difference between myostatin and other muscle proteins like myosin and actin?

• Myostatin stores energy

• Myostatin has a different structure and function

• Myostatin builds muscle fibers

• Myostatin is a type of hormone

What happens when partial myostatin protein does not fit correctly into the receptor?

• The message is sent to the cell.

• The animal develops typical muscles.

• The animal develops extra-big muscles.

• The receptor is destroyed.

What did scientists change in mice to investigate the heavily muscled phenotype?

• The diet of the mice

• The structure of a specific region of a chromosome

• The environment of the mice

• The age of the mice

What was the original name given to the protein before it was renamed myostatin?

• GDF-8

• MSTN

• Myo

• Statin

What are the two different versions of the gene called?

• Chromosomes

• Proteins

• Alleles

• Cells